Improvement in hollow augers



A. BERRY.

HOLLOW AUGER.

Patented 4Feb;` 22, 1876.

INVEMTOR WITNESSES N.PIERS, PHOTO L THOGRAFH UEITED STATES PATENT OFFICE.

AUSTIN BERRY, or WATERLOO, CANADA.

IMPRVEMENT IN HOLLOW AUGERS.

Specification forming part of Letters Patent No. 173,885, dated February 22, 1876; application filed December 31, 1875.

To all u'hom it may concern:

Be it known that I, AUsTrN BERRY, of

Waterloo, in the Province of Quebec, Canada,

' forth.

In order to enable others skilled in the art to which my invention appertains to make and use the saine, I will now proceed to describe its construction and opera-tion, referring to the annexed drawing, in which- Figure 1 is a side elevation of my invention. Fig. 2 is a longitudinal section oi' the same, and Fig. 3 is an end View thereof.

My invention isintended principally for the hollow angers used by carriage-makers to make tenons on spokes. With the angers now generally used for this purpose the operator is obliged to fetch the end of the spoke to a point, or make it small enough to enter the mouth ofthe auger, in order to have the auger work, as it is impossible to get the auger to start unless the spoke is first pointed so as to enter the mouth ot' the auger.

A represents the head of the auger, in which the knives or bits B B are fastened in the usual manner. C is the tubular shank or stem of the auger, the center bore of which extends through the head A. Inside the auger is placed a sliding plunger, D, in the front or outer end of which is placed a pointed center, E. Through the shank G, directly above the knife-head A, is cut a longitudinal slot, a, through which a screw, b, is passed into the sliding plunger D, and against the pointed center E, to hold the sametirmly in place. The center E can be moved in or out, as required, it being necessary for the center to be farther out for soft wood than for hard. Around the shank G is placed an exterior sleeve, G, through which is cut a slot al, corresponding with the slot a in the stem G, and the screw b passes through said slot al also. At the front or outer end of the slot a* is cut another slot, a2, at right angles there-- with, so .that by turning the sleeve G to canse the screw b to enter said slot a2 the sliding plunger D will be locked and held stationary at the mouth of the auger, which is necessary until the auger is fully started on the tenon. As soon as the auger is started onto the tenon the sleeve G is turned back so that the slots a al will correspond, which will allow the sliding plunger to recede as the tenon is formed and passes up the mouth D, is placed acoiledwire spring, H, which is p designed to be used only when the auger is being used in a lathe, in which case the sleeve G is not supposed to be used to hold the plunger downto its place at the mouthV of the anger; but it is not necessary to remove the socket from the auger, but just to turn it, so that the slots a al will coincide, and then fasten the sleeve by turning the screw d down tight. When the auger is being used in a bit-stock or turned by hand the spring is' designed to be removed, which can be easily done by taking out the screw b that passes through the slots q. al into the plunger D, and then the plunger will slip out of the mouth of the auger, and then the spring is easily removed.

I do not claim a .hollow auger in which a sliding plunger is provided with a center point, when said center point is not adjustable, as l am aware that such is not new.

4 Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a hollow auger, A B G, I claim a central sliding plunger, D, having an adjustal' ble center point, E, substantially as and for In testimony that I claim the foregoing I the purposes herein set forth. hve hereunto set my hand this 27th dey of 2. The combination, with n hollow auger, December, 1875. A B G, of the sliding plunger D, with edjustable center point E, the sleeve G, and the setp AUSTINv BERRY. screw b passing through slots a al, and beary ing against the adjustable point E, all cou- Witnesses:

struoted substantially as and for the purpose JOHN FITZGERALD,

herein set forth. O. P. BLQSS. 

